RELATED: If You Notice This on Your Nails, Get Your Thyroid Checked, Doctors Say. If you notice dents, holes, or depressions in your fingernails, this is a sign of pitted nails—one of seven “fingernail problems not to ignore,” flagged by the Mayo Clinic. Their experts note that nail pitting is often caused by autoimmune disorders. These commonly include psoriasis, inflammatory arthritis, and connective tissue disorders such as Reiter’s syndrome and alopecia areata.ae0fcc31ae342fd3a1346ebb1f342fcb Experts say nail pitting is especially common in cases of psoriatic arthritis. In fact, according to the informational site Creaky Joints, nearly 90 percent of people with this condition experience such changes in the nails. “Both fingernails and toenails can be affected, and it can affect one nail or all 20 nails,” Mona Gohara, MD, associate clinical professor of dermatology at Yale School of Medicine, told the site. RELATED: If You Notice This on Your Hands, Get Checked for Cancer. According to Very Well Health, you may notice several other nail-related symptoms if you experience pitted nails. These can include nail discoloration which can appear in a shade of white, yellow, or brown, nails that crumble, nails that separate from the nail bed, blood underneath the nails, changes in the nail’s shape or deformation of the nail. If your doctor is unable to diagnose your condition based on the presence of one or more of these symptoms, they may opt for a skin biopsy, which can help identify an infection or abnormality. Given the wide range of possible autoimmune conditions related to this particular symptom, it’s important to mention your full range of symptoms, even if they seem unrelated. In addition to nail changes, these may include hair loss, skin changes, joint pain, and more.

The connection between your fingernails and an autoimmune condition may not seem immediately clear, but experts say nail pitting occurs as a result of inflammation. Specifically, this takes place in the nail matrix, the part of your fingernails and toenails that generates growth and pushes out the dead cells that become your nails. Over time, the marks on your nails may actually serve as a record of your condition’s progress. If the depressions on your nails are followed by a stretch of smooth, healthy nail, it may mean that your inflammation has ceased for some length of time.

RELATED: For more up-to-date information, sign up for our daily newsletter. The most important thing to remember about nail pitting is that it’s not only a cosmetic issue, but a potential sign of a deeper problem. As such, you should always work with your doctor to address the underlying cause before focusing on aesthetic improvements. Experts say there are several ways to improve the look of your nails over time, and most suggest going “au natural” as one of the best methods. This means keeping your fingernails short and clean and avoiding manicures, which can be traumatic for your recovering nails. Resist biting or picking at your nails, both of which can cause infection, and avoid cutting or pushing back your cuticles. Wear protective gloves during gardening, dishwashing, or any other activity that could damage your nails or expose them to harsh substances. While other interventions may help to varying degrees—phototherapy or certain supplements, for example—your doctor may simply recommend treating the underlying cause and waiting for healthier nail regrowth. If the underlying condition causes flareups, you may experience pitting and healthy growth intermittently. Your doctor can help you identify the underlying cause for your pitted nails, and discuss the full range of possible interventions. RELATED: If You See This on Your Nails, It Could Be a Tell-Tale Sign of Diabetes.